Diving certification Scuba diver and PADI Open Water Diver is the most popular in the world and has introduced millions of people to the lifestyle of adventure buceo.El PADI Scuba Diver course is a part of Open Water. If you do not have much time but I really want to become a certified diver, this course is the best option for you, especially if you intend always to go diving with a guide or professional diving up to 12 meters deep.